NEC MultiSync LCD1525V Service Manual page 51

2.2.2 Contrast adjustment
1) Use the VG-819 and enter Signal 20, in order to obtain a 16 gray pattern display.
2) Open the service menu. (See 2.2.1 herein.)
3) Using the 3 and 4 keys, select Tag 2 of the service menu and provide a display of the [AUTO OFFSET,
AUTO CONT MAX] screen.
＋
1
AUTO OFFSET
R OFFSET
G OFFSET
B OFFSET
AUTO CONT MAX
R CONT
Ｂ Ｂ Ｂ Ｂ ＣＯＮＴ ＣＯＮＴ ＭＡＸ
G ＣＯＮＴ ＣＯＮＴ CONT
B CONT
AUTO OFFSET, AUTO CONT MAX screen
4) Using the 5 and 6 keys, adjust the HIGHLIGHT to [AUTO OFFSET] and press the PROCEED key.
Confirm that the values at the right of [R OFFSET], [G OFFSET], and [B OFFSET] change in the meantime.
Then, using the 5 and 6 keys, adjust the HIGHLIGHT to [AUTO CONT MAX] and press the PROCEED
key. Confirm that the values at the right of [R CONT MAX], [G CONT MAX], and [B CONT MAX] change in
the meantime.
5) Using the 3 and 4 keys, select Tag 1 of the service menu and provide a display of the [FACTORY
PRESET] screen.
＋
1
HOURS
ON
OFF
B135: REV.BC
CPU: TS87C51 RC2-MCB
Ｂ Ｂ Ｂ Ｂ ＣＯＮＴ ＣＯＮＴ ＭＡＸ
ＣＯＮＴ ＣＯＮＴ
CPU
CPU
FACTORY
6) Use the VG-819 and enter Signal 20, in order to obtain an all-white display.
7) Using the 5 and 6 keys, adjust the HIGHLIGHT to [FACTORY PRESET] and press the PROCEED key.
Confirm that the values at the right of [HOYRS RUNNING] to zero.
8) Press the EXIT key 4 times and close the service menu.
3 4
2
MAX
ＭＡＸ
ＭＡＸ ＭＡＸ MAX
MAX
2 3 4
RUNNING
0 H9 M
11 H19 M
ＭＡＸ
ＭＡＸ ＭＡＸ
CODE:
VER:DC150VM107B
PRESET
FACTORY PRESET screen
5 6
128
128
128
255
255
255
5 6
4-3